Refrigerating apparatus



Parental Nov. 12, 1929 HARRY W. DYER, F NEW YORK, N. Y.

REFRIGERATING- APPARATUS 'Appucationme irarch 2e, 1926.l rserial no.97,799.

This invention relates to a refrigerating apparatus and relatesspecifically to an ap-` "paratus for cooling liquids and it also relatesto a combined apparatus for -iltering and cooling liquids.- ItsA objectsare to provide a portable cooling and filtering a paratus in a selfcontained unit, to provide a ltering apparatus that is automaticallymaintained under pressure and to provide for the regulation of. saidapparatus. Other objects, including the details of the constructionwill'be more particularly understood from the following specificationand the accompanying drawings, in which, Fig. 1 is a sectional elevationof an apparatus embodying my invention, Fig. 2 is a detail of the llingvalve and Fig.

3 is a longitudinal section of a type of pump 'that may be'used withthisapparatus.

This invention includes a mechanical re- 2o frigerator for cooling aliquid such as drinking water-in combination with a filter system inwhich the water is placed inaffilter tank and forced underpressurevthrough a lter medium into a cooling tank where it is sub- 25 ject tothe action of mechanical refrigeration so as tol maintain an even lowtemperature in the water as it is used. The mechanism which operates themechanical refrigeration also operates the apparatus-which maintains thepressure inthe lter tank. This apparatus mayl be controlled by thetemperature of the cooling Avtank'and by the pressure of the liltersystem by an arrangement of automatic control.

The ilter tank is placed on top ofI thede vice and through an opening inthe cover,

the iilter'element maybe removed fol inspection.

tank, enclosed by the top 12 and having the lid 13 which is heldairtight on a gasket b the cleats 14. The-filterimedium 16 is pre erablymade from unglazed porcelain in the form of an elongated'inverted jar asshown,

45 with shoulders which bear upon the rubber gasket 18 and an orificeopening into the lcooling chamber c. This filter element is maintainedin a vertical Iposition by theconi cal bearing surfaces 18 and bythe'spring `15' 50 which holds it lseated under pressure and Referringto, the drawings, 11 is the iilter centres it with lid 13. It will benoted that this lid is of such size as to permit removing theilterthrough the opening when the lid is removed. j

The filter tank is enclosed by the bottom pat'e 17 and a water gage '19shows the heighto through the valve 20 controlled by the handle 21, bestshown in the sectionaldrawing, in Fig. 2. Thefvalve stem is hollowandlhasra port communicating'with the opening 7 3 to the interior ofthetank. A lid 72 covers the water in this tank. This tank filled valveopening at 7 las shown. When in the l position shown water can be pouredinto the tank through 71 and when the valve is turned around the opening73 is closed andthe filter tank is air tight.

l The cooling tank 0 formed by the tubular wall is connected to thebottom' plate 17 of the filter tank by. a water tight connection throughthe gasket 26. The cooled beverage is drawn off from -this tank by 27. Atube 29 projects from the bottom into the cooling tank forlreceiving thethermostat 30 which is thus placed in intimate contact with the cooledliquid. The cooling tank iss urrounded by an outer shell 31 whichencloses the heat insulating covering 32 of the tank.;v .Therefrigerating yapparatus is enclosed by y the shell 35 to which thefilter tank is secured at 36.' This shell is provided with a base plate37 for supporting and enclosing the apparatus. An annular air duct 38with openings 39 is preferably connected 'with a mechanical circulatingsystem, not 'shown inthe drawing, for creating' an air circulation forcooling the coil 40.

`The refrigeratin mechanism is operated by the motor which i`s driven bythe source of power indicated bythe battery 46. As

shown in Fig. 1 the motor operates 'a pump and expander in the casing47, the pump 48 -being of the fan type andL arranged to pump the gaseousrefrigerant from the chamber 49 tothe chamber 5.0 where it is led underpressure through pipe 51 to the cooling coil 40, and Vfrom the/coolingcoil it is led by pipe 58 to chamber 'where it expands through the fan53',y mounted on the sameshaft as 48vinto chamber 54. From this chamber,after expan# i 56to chamber 49, where it is again compressed ncontrolled in multiple circuit by the pressure by 48 and delivered to 51to repeatthe cycle in a closed circuit system. f

A make-up pumpis provided on the shaft of the motor at 5.9 which takesin air at and through pipe 61, 62 and check valve 63 maintains a supplyof air in pipe 51 to compensate for any leakage that may arise in the-system. In addition, this make-up pump,

through the check valve 64 and pipe 65 maine -t-ains an air pressure inthe filter tank a, for

purposes hereafter described.

The circuit of the motor 45 is controlled by the thermostat 30 accordingto the temperature of the liquid in tank c; it is also valve 80according to the pressurein the ilter tank. This valve connects by pipe81 with pipe so thatitis subject to the pressure in tank a. Thispressure, through the piston opposes spring 8,1a and raises plunger 82to interrupt the motor circuit at 83 when a pref determined pressure hasbeen reached. As the pressure falls, the motor circuit is reestablishedthrough wires 84 and 85 ,and the pump -is' operated again until thepredetermined pressure is restored.

Attention is `here directed l-to the fact that the system describedcontemplates the use of 4air as a refrigerant and the make-up pumprestores air to the sytem. It should be understood .however that apartfrom maintaining pressure in the-filter tank, the mechanicalrefrigerating apparatus used in carrying out this invention may bearranged to use other refrigerants than airor gas, such as the volatileliquids vland thel coil 28 may be placed' outside of the cooling tank c.An example of another type of refrigerating apparatus used in awatercooler will be ,found in my U; S. Patent 1,415,231, of May 9, 1922.

The pump in Fig. 3 may be used as an alternative to the pump shown inFig. 1. Thisl pump is of the screw type in which the screws 76 and 77are mounted on the motor shaft 75 and arranged by screw action todeliver the refrigerating medium between the chambers of the pump in themanner already described. Pumps of this type are preferred to plungerpumps which require valves and are noisy in operation. y l

In operation, the `motor is connected with asource ofvelectric suppl Thetank a is i filled with water close to t e,.top of the gage Leo throughthe valve20. As the motor is operated the air pressure in a is built upwhichforces the waterthrough the lter medium into b and into the coolingchamber c where it iscooled by the refrigerating coil 28 and drawn oftas required at 27 Filters of the -I class described are usuallyconnected b piping with awater pressure system'and t e air pressure intank ais provided as a substitute for this pressure so that theapparatus can be installed as a unitwithout plumbing con-v nections, andis readily portable.

mined low temperature has been reached. As

the water is used the temperature lincreases and also the pressure intank a decreases, thus establishing the motor circuit again for coolingthe liquid and restoring the pressure in the filter tank. The pressureat which valve y y8() opens the motor circuit is .adjustable by thescrew connection between 83 and the stem 82.

Having thus described my invention, I claim: i

1. In a portable refrigerator and lter, ythe combination'of a liquidreceptacle, a cooling chamber below said receptacle, an inverted hollow`filter element interposed between said receptacle and said chamber, arefrigerator combination of a liquid receptacle, a cooling chamber, afilter element interposed between said receptacle and said coolingchamber, a

refrigerating coil for said cooling chamber and a mechanism for forcingair through said coil as arefrigerating medium and a make-up pump forforcing air into said receptacle under pressure and for making upleakage in said refrigerating medium.

3. In a portable refrigerator and ilter, the combination of a liquidreceptacle, a cooling chamber, a filter element interposed -between saidreceptacle and said cooling chamber, a refrigerating member` for coolingsaid chamber, a mechanism for forcing a refrigerating medium throughsaid'member-and for maintaining an air pressure in said receptacle andmeans controlling said mechanism by the pressure in said receptacle.

4. In a portable refrigerator and filter, the combination of a liquidreceptacle, a cooling chamber, a filter element interposed between saidreceptacle and said cooling chamber, a

refrigerating member for cooling said chain-- ber, a mechanism forforcing a refrigerating medium through said member and for maintainingan air pressure in said receptacle and means controlling said mechanismby .the

ico

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and a refrigerating coil for cooling said chamber including a mechanismfor forcing air through said coil andrinto said receptacle at the samepressure.

6. In a portable refrigerator and filter, the combination of a liquidreceptacle, an invvertel cylindrical lter element placed vertically insaid receptacle and, having an open end, a cooling chamber connectedwith the open end of said filter element, a refrigerating member forcooling said chamber and a mechanism automatically controlled by thetemperature of said cooling chamber for forcing a refrigerat-ingmediumthrough said member.

7. In a self contained filter unit as described, the combination of aliquid receptacle, a cooling chamber and a filter element interposedbetween said receptacle and saidl cooling chamber land means,automatically controlled by the temperature of said cooling chamber, formaintaining an airpressure in said receptacle. Y l 1 8'. In a selfcontained lter and refrigerator unit as described, the combination of aliquid receptacle with a lid onvthe top, a filter element placedcentrally in said receptacle and arrangedto pass through the opening ofthe lid, means associated with said lid for holding said filter inposition, 'a cooling chamber communicating directly with said filter andlocated below said filter, a refrigerating coil in said chamber, amechanism for `:forcing a refrigerating medium through said coil andmeans for automatically controllingsaid mechanism.

9. In a self` contained filter and refrigerator, the combination,a'liquid receptacle, a

` removable filter element located in said receptacle and having aportion extending substantially from the bottom to the top'of saidreceptacle, a heat insulated housing, a cooling chamber having anorifice in said house Y ing, a refrigerating element for cooling saidchamber, a motor operatmg a pump, Asaid pump connected with-saidrefrlgeratlng element for circulating a refrigerating mediuml therein, athermostat controlling said motor by the temperature of said coolingchamber, said removable filter element connected with the orifice ofsaid chamber, means for Aholding said filter element in place and meanswhereby said filter element may be removed from said receptacle.

Signed at New York, in the county of New l nYork and State of New York,this 16th day of March, A. l). 1926.

HARRY W. DYER.

